Discovered for the first time in 1926, the Nazca Lines decorate the arid soils of the Pampa Colorada, north of the city of Nazca, in south Peru. These lines extend through an area of around 500 square kilometers, illustrating people, animals, plants and even geometrical figures, and it is almost impossible to see what they represent from the ground. No one knows exactly who draw them, nor what was their purpose. Geologists believe they were made around 2000 years ago by the people of the Nazca culture (≃ 200 BC – 600 AD), some even predating them and belonging to the Paracas culture. There is a lot of speculation around these drawings. Some people nowadays believe these lines represent sacred paths, which one must follow to understand a higher meaning, or were used in spiritual rituals. Others see in it an astronomical calendar, turned to the skies. In 1994, UNESCO added this site to its World Heritage List. You can read more on the Nazca Lines here.